cacheid attribute on cfquery is not working

As per the CF10 documentation,

So what I have tried is simply,

<cfquery name="qryGetStudents" datasource="localdsn" cachedwithin="#createTimeSpan(1,0,0,0)#" cacheid="q1">

    SELECT    *

    FROM    student

</cfquery>

and dumped

<cfdump var="#CacheGetAllIds()#">

CacheGetAllIds() returns an array, So logically this array should contain the cache id "q1" .But I can not see that.

Anyone else faced the same?